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51.
As an application of optical parallel computing, optical implementation of the baker’s map is studied. Usingoptically addressed spatial light modulators, an optical feedback system was constructed. We confirmed that a fractal set can be generated optically by iterative baker’s map on an experimental system. 相似文献
52.
Yasuhiro Awatsujl Nobuyuki Sakamoto Hidetoshi Utsuro Jun Tanida Yoshiki Ichioka 《Optical Review》1997,4(1):A199-A202
We present the architecture of novel optoelectronic parallel computing called optical array logic network computing (OAL-NC).
In the OAL-NC, electronic processing elements execute local operations, whereas an optical network processor is dedicated
to global operations as well as data transfer. As a prototype of the OAL-NC, a 16x16 pixel system is designed at a logical
level. Issues associated with the design task are discussed. 相似文献
53.
54.
Ohyama J Teramura K Higuchi Y Shishido T Hitomi Y Aoki K Funabiki T Kodera M Kato K Tanida H Uruga T Tanaka T 《Physical chemistry chemical physics : PCCP》2011,13(23):11128-11135
We previously reported that a porphyrin-cored tetradentate passivant, which has two disulfide straps over one face of the porphyrin plane, can produce monolayer-protected gold nanoparticles, 2-4 nm in size, by the one-pot reduction of HAuCl(4) in DMF. The resulting nanoparticles are smaller than those prepared using the same S/Au molar ratio of a monodentate passivant. To examine the formation mechanism of small gold nanoparticles, the formation of gold nanoparticles in the presence of porphyrin-cored tetradentate passivants or a structurally related monodentate passivant was studied by time-resolved quick X-ray absorption fine structure spectroscopy. The results demonstrated that all of Au ions in solution are reduced to compose small Au clusters, i.e. nuclei, just after the NaBH(4) reduction of HAuCl(4) in both cases, but their size varied with the initial S/Au molar ratios and structure of the passivants. Thus, the size of Au nuclei was kinetically controlled by the passivants. Interestingly, the porphyrin-cored tetradentate passivant could stabilize smaller gold nanoparticles, 2-4 nm in size, but it was less efficient in trapping the Au nuclei formed at a very early stage, in comparison to the monodentate passivant. 相似文献
55.
Ikeda M Yoshii T Matsui T Tanida T Komatsu H Hamachi I 《Journal of the American Chemical Society》2011,133(6):1670-1673
Fluorescent sensor materials for rapidly and conveniently detecting polyamines in biological fluids are highly desirable for cancer diagnosis. We herein describe the hybridization of a supramolecular hydrogel with a layered inorganic host adsorbing a fluorescent dye which produces a fluorocolorimetric sensor for spermine and spermidine, important biomarkers for cancers, in artificial urine. 相似文献
56.
We propose a compact compound-eye projector using superresolved projection. The optics are composed of multiple small suboptics (units) to reduce their thickness in the projector. Each of the suboptics adds a subpixel shift to a projected image for superresolved projection and has a color filter or a dispersive element for multicolor projection. The projected images in the units are determined via a model of the system in preprocessing. The images are projected by the suboptics and superimposed on a screen. In this Letter, we describe the system model and show the simulation results. 相似文献
57.
This paper presents an experimental assessment and analysis of super-resolution microscopy based on multiple-point spread function fitting of spectrally demultiplexed images using a designed DNA structure as a test target. For the purpose, a DNA structure was designed to have binding sites at a certain interval that is smaller than the diffraction limit. The structure was labeled with several types of quantum dots (QDs) to acquire their spatial information as spectrally encoded images. The obtained images are analyzed with a point spread function multifitting algorithm to determine the QD locations that indicate the binding site positions. The experimental results show that the labeled locations can be observed beyond the diffraction-limited resolution using three-colored fluorescence images that were obtained with a confocal fluorescence microscope. Numerical simulations show that labeling with eight types of QDs enables the positions aligned at 27.2-nm pitches on the DNA structure to be resolved with high accuracy. 相似文献
58.
Shimomura Suguru Nishimura Takahiro Miyata Yuki Tate Naoya Ogura Yusuke Tanida Jun 《Optical Review》2020,27(2):264-269
Optical Review - Quantum dots (QDs) have a great potential for realizing information processing because of their signal-modulation capability based on energy transfer. We present a method for... 相似文献
59.
Ryoichi Horisaki Yoshizumi Nakao Takashi Toyoda Keiichiro Kagawa Yasuo Masaki Jun Tanida 《Optical Review》2009,16(3):241-246
A compact system of the thin observation module by bound optics (TOMBO) imager based on compound-eye imaging has been constructed
to demonstrate its advantages over single-eye imaging systems such as thinner hardware. To reconstruct a high-resolution image
from low resolution images captured by the compound-eye optics, we propose an image restoration scheme based on the iterative
back-projection algorithm with depth map estimated from the disparities on the captured image. The scheme includes suppression
of unit-by-unit color shift caused by the offset microlenses and the color filters on the commercial image sensors and deblurring
of defocus by geometrical optics using the depth map. In the experiment, three-dimensional objects were captured by the TOMBO
imager and reconstructed with the scheme. After the processing, the power spectrum of the captured image was improved by up
to 19 dB, and the power spectrum of the effect of the color shift was reduced by 7 dB. 相似文献
60.
Noumi H Saha PK Abe D Ajimura S Aoki K Bhang HC Endo T Fujii Y Fukuda T Guo HC Imai K Hashimoto O Hotchi H Kim EH Kim JH Kishimoto T Krutenkova A Maeda K Nagae T Nakamura M Outa H Sekimoto M Saito T Sakaguchi A Sato Y Sawafta R Shimizu Y Takahashi T Tang L Tamura H Tanida K Watanabe T Xia HH Zhou SH Zhu LH Zhu XF 《Physical review letters》2002,89(7):072301
We have studied the (pi(-),K+) reaction on a silicon target to investigate the sigma-nucleus potential. The inclusive spectrum was measured at a beam momentum of 1.2 GeV/c with an energy resolution of 3.3 MeV (FWHM) by employing the superconducting kaon spectrometer system. The spectrum was compared with theoretical calculations within the framework of the distorted-wave impulse approximation, which demonstrates that a strongly repulsive sigma-nucleus potential with a nonzero size of the imaginary part reproduces the observed spectrum. 相似文献